The IS200TREGH1A in the Mark VI Protection Path
The IS200TREGH1A is a turbine emergency trip terminal board from the GE Speedtronic Mark VI (IS200) family. It belongs to the protection side of the control system rather than the everyday process I/O, serving as the field-wiring termination for the emergency-trip circuit. On this board the plant’s emergency-stop and protection trip-interlock wiring is landed and brought together with the trip-solenoid connections, which is why correct identification and careful handling matter so much on this particular assembly.
Because the emergency trip function is safety-related, this listing is written for identification and sourcing only. Trip settings, the internal voting arrangement, and any online or offline test steps are not covered here — those belong to GE’s system documentation (GEH-6421, Mark VI System Guide) and to your site’s written trip procedures. Use this page to confirm you are ordering the right board, not to configure or test the protection.
Which Modules the TREG Works With
In a Mark VI system the TREG is driven by the VPRO emergency-trip/protection processor and works together with two companion terminal boards: the TPRO (turbine protection) board and the TRPG (primary trip) board. The TREG provides the positive side of the trip-solenoid DC power while the TRPG provides the negative side. Connection to the protection module is made through cables with molded plugs. In a Mark VIe protection system the same terminal board is instead managed by a PPRO I/O pack seated on the SPRO board, again through molded-plug cabling. The board’s JX1, JY1 and JZ1 connectors each carry an ID device that the protection processor reads to confirm plug location, board type and revision.
Identify Before You Buy: the Board Versus the Protection Module
Like other Mark VI terminal boards, the TREG is largely a passive termination and interconnection assembly — the intelligence and the diagnostics live in the protection module, not on the board. That has practical consequences when you are chasing a fault:
- Diagnostic alarms for the trip circuit are generated by the protection processor (VPRO, or the PPRO on SPRO), so read the fault there before assuming the terminal board is bad.
- A hardware-incompatibility fault often means an ID-device or revision mismatch at a JX1/JY1/JZ1 plug, or a cable or connector problem — not necessarily a failed board.
- Field-side issues, such as the emergency-stop string, interlock contacts, or solenoid wiring, present at the board but originate out in the field.
Replace the terminal board itself when there is visible physical damage — cracked terminal blocks, corroded or heat-stressed terminals, damaged connectors. For anything touching the protective function, follow the GE manual and plant procedure rather than swapping parts speculatively.
H1A, and Why New Builds Use H1B
Reading the number: IS200 is the Mark VI assembly series, TREG the emergency-trip functional code, H1 the hardware group, and A the functional revision; the full number IS200TREGH1AAA adds the trailing artwork revision. The H1A is the 125 V dc emergency-trip board; GE documents the later H1B as the version used in its place for new production. The two are closely related, but you should match the exact number your system carries — especially in redundant protection arrangements, where board type governs how control power is separated. Our GE Speedtronic Part Number Decoder breaks down each field.
Safety Note and Reference Documentation
This IS200TREGH1A sits in the emergency-trip path, so treat any work on it as safety-critical. We supply the hardware and help you identify the correct part; we do not provide trip setpoints, voting details, or test sequences. Refer to GEH-6421 and your plant’s protection procedures for those. If you are comparing protection hardware across control generations, see Mark V vs Mark VI: DS200 to IS200, and browse related items in GE Speedtronic Turbine Control Boards.
What to Send for a TREG Quote
To match the board exactly, give us the full part number with suffix (IS200TREGH1AAA), the revision on the board label, a clear photo of the label, your turbine model and Mark VI generation, whether the protection is simplex or redundant, the quantity, and how urgently you need it.
Request a Quote on the IS200TREGH1A
We ship the IS200TREGH1A worldwide on DDP terms, respond to quote requests within 24 hours, and accept purchase orders from qualified plants and integrators. Click Request a Quote with your quantity and we will confirm availability and lead time.
IS200TREGH1AAA Listing Reference
General Information about the Product |
Part Number |
IS200TREGH1A Mark VI IS200 |
Description |
GE General Electric IS200TREGH1A IS200TREGH1AAA Gas Turbine Emergency Trip Board |
Condition |
used Cleaned and Tested. With 1 Year Warranty. |
